Hydraulic windlass for drop-stamping machines



J. A. PERONY.

HYDRAULIC WINDLASS FOR DROP STAMPING MACHINES.

. APPLICATION FILED NOV. 2,.1920- 1,417,856, Patented May 30,1922.

3 SHEETS-SHEET 1.

J. A. PERONY.

HYDRAULIC WINDLASS FOR DROP STAMPING MACHINES.

APPLICATION FILEID NOV. 2, 192m 1,417,856, Patented May 30, 1922.

3 SHEETS-SHEET 2.

J. A. PERONY.

HYDRAULIC WINDLASS FOR DROP STAMPING MACHINES. APPLICATION FILED NOV. 2,1920. 1,417,856.

3 SHEETS-SHEET 3.

Patented May 30, 1922.

UNITED STATES PATENT OFFICE.

JEAN ALBERT PERONY, OF S'lI-OUEN', FRANCE, ASSIGNOR T0 SOCIETEDOUTILLAGE MECANIQUE ET DUSINAG-E DABTILLERIE, OF S'IE-OUEN, SEINE,FRANCE, A LIM- I'IED JOINT-STOCK COMPANY OF FRANCE.

HYDRAULIC WINDLASS FOB DROP-STAMPING MACHINES.

Specification of Letters Patent.

Patented May 30, 1922.

Application filed November 2, 1920. Serial No. @1351.

T0 alien/1.0m 2'2? may concern Be it known that I, JEAN .Annnnr Pnnonr,citizen of the Republic of France, resident of St-Ouen, Seine, France,have invented new and useful Improvements in Hydraulic lVindlasses forDrop-Stamping" lilachines, which invention is fully set forth in thefollowing specification.

Numerous methods of lifting the tups of drop-stamping machines areknown. large class of such machines comprises a Windlass situated at theupper part of the machine for raising the tup through the medium of aflexible member such as a cord or belt.

The present invention has for its object to provide an improvedconstruction of windlass for drop-stamping machines of this class.utilizing the action of water under pressure.

According to this invention the drum for driving the lifting; cords orbelts of the wind- ]ass, is fixed on a shaft which is caused to rotateby the action of hydraulic cylinders having the form of racks Ineshimrwith pin- :ions fixed to the shaft on which the drum keyed.

This invention comprises, further, a special position for the attachmentof the belt, which allows an initial acceleration of the weight. and anapparatus for the control of distributors that allows of controlling themotion of the tup by the corresponding motion of the hand of theoperator.

A constructional form of this invention is illustrated by way of examplein the accompanyingdrawings in which Fin. 1 is a side elevation showingthe entire machine. -l' t the lower part there shown an anvil and a topsimilar to the corresponding parts of all known drop-stampinnmachines.i. t its upper part there is shown the Windlass that constitutes the suhject matter of this invention; this windlass is carried by a metalstructure, but could he supported by any other known means.

F 2 is a section taken along the axis of the shaft of the Windlass.

Fig. is a section along the axis oi one of the cylinders. showing themeshing of this cylinder with the corresponding pinion on the windlassshaft.

Fig. 4 is a, diagrammatic view of the distributing apparatus.

In these figures, A is the belt for lifting lia .the weight; B is thepin for fixing this "belt to the lifting drum; C is the lifting drum; Dis the shaft of the drum, mounted in bearings E; F are the hydrauliccylinders for rotating the shaft D; G are the pistons of these hydrauliccylinders; these fixed pistons are bored with an axial hole that servesfor the admission or exhaust of the water under pressure; H and I arepipes for con necting the cylinders togethen J is the pipe forestablishing communication between the distributor and the group ofhydraulic cylinders; K is the distributor; M is the operating lever; Nis the operating cord actuated by hand.

The operation of the machine is as follows:

W hen the operating cord N is pulled, the lever M is raised at its righthand end, whereas its left hand end bears by means of a roller m upon acam Z carried by the Windlass shaft. A. piston O carrying the pivot pin0 of the lever M, is then raised, and it pulls the lever P which causesone of the plug valves T of the distributor to close, and the other plugvalve S to open. The water under pressure, admitted by way of the pipell, is then admitted into the passage J. and then into the pipes H and Ifor admission into the cylinders F. The water under pressure, in actingupon the cylinders F, causes the windlass shaft to move in the directionof the arrow, and consequently to lift the weight.

The rotational motion of the shaft D of the windlass causes the cam Z tomove, and the motion of the cam Z allows the-left hand end of the leverM to drop; the result is that if the position of the hand of theoperator acting upon the cord N has not changed, then the point 0 willdrop as well the lever P, thus causing the closing of the plug valve S;the rising movement of the weight or tup stops. If the operator pullsthe cord N anew so that his hand occupies a new but lower position, theoperation of the parts will he the same, and the tup will be stopped ina fresh position corresponding to the fresh position of the hand of theoperator.

Inversely, if the operator raises his hand in letting go the cord N,then the right hand end m of the lever M will drop as well as the lefthand end of the lever P, under the action of the spring L, and theresult will be haust.

operator, both in lifting and descending,

there corresponds a position of the tup, and the movement of the weightreproduces constantly on a larger scale the shiftmg of the hand of theoperator.

At the commencement of the rise of the weight, it is necessary to haveavailable a lifting force that is clearly greater than the weight of thetup to be lifted, so as to produce a rapid acceleration of the weight.

Then when the normal speed of ascent has been attained, there is nowonly necessary a lifting force that will balance the weight of the tupand the passive resistances. Since the effortproduced by the hydraulicpistons is constant, the above condition is satisfied by the specialposition which is given according to the present invention to the pointof attachment of the lifting belt. This position shown in Figs. 1 and 3is such that the lifting belt is not directed tangentially to the drum.The resisting moment of the weight to be lifted. relatively to the axisof rotation, is then clearly smaller than when the attachment hasarrived at the point in dicated in Fig. 4:, where the belt is tangentialto the drum.

In the position shown in Figs. 1 and 3, the driving couple of forcesproduced by the pressure of water is very substantially greater than theresisting couple, thereby allowing a rapid acceleration of the weight.When the belt becomes a tangent to the drum, the driving couple exceedsthe resisting couple only by the amount that is necessary to overcomethe passive resistances.

During the lift, the maximum speed of ascent of the weight is that whichis allowed by the dimensions of the water inlet orifice. If the cord Nbe let go suddenly during the descent, thespeed of the drop will belimited only by the resistance to the outflow of the water contained inthe cylinders F through the distributing orifices, and it will always bepossible to makethe said orifices sufficiently large so that the speedof the drop shall be substantially equal to the speed of a free fall.

It is obvious that the distributor K may be of a type entirely differentfrom that shown in Fig. 4:- If the weight of the tup requires adistributor of such dimensions that its direct operation by the hand ofthe operator becomes difiicult, then the distributor may be adistributor of small size, actuating through an auxiliary motor adistributor of the requisite size. Any desired number of liftingcylinders may be employed; in the accompanying drawings they are shownas being six in number, arranged in pairs of two cylinders actingoppositely to each other so as to exert a driving couple upon the shaft.Nevertheless only four, two or even one cylinder might be employed; oragain, a greater number of cylinders might be employed in order to causethe rotation of the shaft. It is further to be noted that the liftingdrum may make a fraction of a revolution, or a complete revolution, or aplurality of revolutions, in orderto correspond with the lift of thetup.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is 1. In a lifting Windlass for drop-stamping machines, thecombination with a shaft provided with a pinion and carrying a drum towhich is attached a flexible connection with the tup, of a motorcomprising a driven member provided with a rack engaging said pinion,and controllable means for regulating the operation of the motor toraise the tup, said controllable means being operable to free the motorand permit dropping of the tup. v 2. In a lifting Windlass fordrop-stamping machines, the combination with a shaft provided with apinion and carrying a drum to which is attached a flexible connectionwith the tup, of a fluid-pressure motor having its movable memberprovided with a rack engaging said pinion, and controllable means forregulating the supply of fluidpressure to the motor whereby to move therack, and raise the tup, said controllable means being operable toreverse of the motor, and permit dropping of the tup.

3. In a lifting Windlass for drop-stamping machines, the combinationwith a shaft provided with a pinion and carrying a drum to which isattached a flexible connection with the tup, of a fluid-pressurepiston-cylinder motor having its movable member provided with a rackengaging said pinion ion whereby the movement of the tup is raised onrack in one direction and dropped on movement of the rack in theopposite direction and controllable means for regulating the supply andCllSCllHIQG of fluid-pressure to and from the cylinder to providereciprocative movement the cylinder and its rack.

5. In a lifting windlass for dro 'i-stamping machines, the combinationwith a shaft provided with pinions and carying a drum to which isattached a flexible connection with the tup, of racks on opposite sidesof the shaft engaging said pinions, oppositely driven motors havingtheir movable members attached to said racks whereby to rotate the shaftin one direction and raise the tup, and common controlling; means forsaid motors operative to release the same and permit dropping of thetup.

6. In a lifting;- Windlass for drop-stamping machines, the combinationwith a shaft provided with a pinion and carrying a drum to which isattached a tlerible connection with the tup, of racks on opposite sidesof the shaft and engaging opposite sides of said pinion oppositelydriven motors on opposite sides of the shaft each having its movablemember attached to one of said racks so that the movements of the racksrotate the shaft and. raise the tup, and controlling; means common tosaid motors operative to release the same and permit dropping of thetup.

7. In a lifting windlass for drop-stamping machines, the combinationwith a shaft provided with a pinion and carrying a drum to which isattached a flexible connection with the tup, of a movable rack engaging"said pinion to rotate the drum and raise the tup, a cylinder attached tothe rack and adapted to move on a stationary piston. and means foradmitting fluid-pressure through the piston into the cylinder to movethe latter and actuate said rack.

8. in a lifting windlass for drop stampinn machines, the combinationwith a shaft provided with a pinion and carrying a drum to which isattached a flexible connection with the tup to be raised, of a movableraclr en gaging said pinion to rotate the drum, a cylinder attached tothe rack and adapted to move on a stationary piston, supply anddischarge pipes for fluid-pressure communicat ing with the cylinder, anda distributor operable to control the passage of fluid through saidpipes and open or close communication of the same with said cylinderwhereby the drum may be rotated in either direction to raise the tap orto permit its fall. I

9. In a lifting Windlass for drop-stamping machines, the combinationwith a shaft provided with a pinion and carrying a drum to which isattached a flexible connection with the tup to be raised, of a movablerack enga ng said pinion to rotate the drum and wind thereon theflexible connection, a cylinder attached to the rack and adapted to moveon a stationary piston, supply and discharge pipes for fiuidpressurecommunicating with the cylinder, a distributor controlling the passageof fluid through said pipes and operable to open or close communicationof the latter with said cylinder, and means actuated by the shaftautomatically operating the distributor to check movement of thecylinder in either direction and arrest rotation of the drum in eitherwinding or unwinding the flexible connection.

10. In a lifting Windlass for drop-stamping' machines, the combinationwith a shaft provided with a pinion and carrying a drum to which isattached a flexible connection with the tup to be raised, of a movablerack engaging said pinion, a cylinder attached to the rack and adaptedto move on a stationary piston, supply and discharge pipes forfluid-pressure communicating with the cylinder, a distributorcontrolling the passage of fiuid through said pipes and operable to openor close communication of the latter with said. cylinder, means foroperating the distributor whereby to rotate the drum and wind thereonthe flexible connection, and mechanism actuated by rotation of the shaftautomatically operatinn the distributor to arrest the winding action ofthe drum.

11. In a lifting windlass for drop-stamp ing' machines, the combinationwith a shaft provided with a pinion and carrying a drum to which isattached a flexible connection with the tup to be raised, of a movablerack engagzing said. pinion to rotate the drum, a cylinder attached tothe rack and adapted to move on a stationary piston, supply anddischarge pipes for fluid-pressure communieating with the cylinder, adistributor controlling the passage of fluid through said pipes andoperable to open or close communication of the latter with saidcylinder, means for operating the distributor to open communication ofthe cylinder with the discharge pipe and permit descent of the tup, andmechanism actuated by the rotation of the shaft automatically operatingthe dis tributor to close communication of the cyl inder with thedischarge pipe and arrest the descent of the tup.

1.2. In lifting windlass for drop-stamping machines, the combinationwith a shaft provided with a pinion and carrying a drum to which isattached a flexible connection with the tup to be raised, of a movablerack engaging said pinion to rotate the drum, a cylinder atta hed to therack and adapted to move on a stationary piston, fluid-pressure supplyand discharge pipescommunieating with the cylinder, valves respectivelycontrolling the passage of fluid through the fluid-pressure with the tupto be raised, of a movable rack engaging said pinion to rotate the drum,a cylinder attached to the rack and adapted to move on a stationarypistom fluid-pressure supplyrand discharge pipes communieating with thecylinder, valves respectively controlling the passage of fluid throughthe supply and discharge pipes, controlling mechanism operable to closethe discharge valve and open the supply valve whereby admitted .to thecylinder causes the latter to rotate the drum and lift the tup, saidcontrolling mechanism being also operable to close the supply valve andopen the discharge valve whereby to release the tup, and mechanismsubsequently actll; ated by the shaft and dropping of the tup adapted toclose the discharge valve and arrest the fall of the tup.

14. In a lifting Windlass for drop-stamping machines, the combinationwith a shaft provided with a pinion and carrying a drum to which isattached a flexible connection with the tup, of a movable rack engagingsaid pinion to rotate the drum and raise the tup, a cylinder attached tothe rack and adapted to move on a stationary piston supply and dischargepipes for fluid-pressure communicating with the cylinder, valvesrespectively controlling the passage of fluid through the supply anddischarge pipes, a lever coupled at one end to said valves, andmechanism for moving the other end of said lever, an upward movement ofthe free end of the lever operating to close the valve of the dischargepipe and to open the valve of the supply pipe whereby fluidpressureadmitted to the cylinder causes the latter to rotatethe drum and windthe flexible connection thereon, subsequent downward movement of thefreeend of the lever operatingto close the valve of the supply inderescapes and the, tup is permitted to drop. 7

15. In a lifting Windlass for drop-stamping machines, the combinationwith a shaft provided with a pinion and a cam and carrying a drum towhich is attached a flexible connection with the tup to be raised, of amovable rack engaging a pinion on said shaft to rotate the drum, acylinder attached. to the rack andadapted to move on a stationarypiston, supply and discharge pipes for fluid-pressur communicating withthe cylinder, valves respectively controlling the passage of fluidthrough the supply and discharge pipes, a lever coupled at one end tosaid valves, and a control lever connected at an intermediate part withthe free end of the valve lever and fulcrumed at one end onsaid cam, anupward movement of the free end of th control lever operating to raisethe free end of the valve lever, close the discharge valve, and open thesupply valve whereby fluid-pressure admitted to the cylinder causes thelatter to rotate the drum and raise the tup, the cam subsequently actingon the fulcrum end of'the control lever to depress the same anc the freeend of the valve lever whereby the supply valve is closed and windingact-ion of the drum arrested, subsequent raising of the free end of thecontrol lever causing a repetition of the opening and closing of thesupply valve.

16. In a lifting windl'ass for drop-stamping machines, the combinationwith a shaft provided with a pinion and a cam and carrying a drum towhich is attached a flexible connection with the tup to be raised, of amovable rack engaging said pinion to rotate the drum, a cylinderattached to the rack and adapted to move on a stationary piston, supplyand discharge pipes for fluid-pressure communicating with the cylinder,valves respectively controlling the passage of fluid through the supplyand discharge pipes, a lever coupled at one end to said valves, acontrol lever connected. at an intermediate part with the free end ofthe valve lever and fulcrumed at one end on said cam, a spring normallypressing the fulcrum end'of the control lever against the cam, means formanually moving the free end of the control lever, an upward movement ofthe same operating the valve lever to close the discharge valve and openthe supply valve whereby fluidpressure admitted to the cylinder causesthe latter to rotate the drum and raise the tup, the cam subsequentlyreleasing the fulcrumed end of the control lever, the latter beingdepressed by the spring to move the valve lever and close the supplyvalve, further upward movement of the free end of the control levercausing a repetition of the opening and closing of the supply valve andintermittent raising of the tup.

17. In a lifting Windlass for drop-stampmunicating with the cylinder,valves respectively controlling the passage of fluid through the supplyand discharge pipes, a lever coupled at one end to said valves, acontrol lever connected at an intermediate part with the free end of thevalve lever and i ulcrumed at one end on said cam, a spring normallypressing the fulcrum end of the control lever against the cam, means formanually moving the free end of the control lever, an upward movement ofthe free end of the latter operating the valve lever to close thedischarge valve and open the supply valve whereby fluid-pressureadmitted to the cylinder causes the latter to rotate the drum and raisethe tup, a downward movement of the free end of the control leveroperating the valve lever to close the supply valve and open thedischarge valve whereby the tup is permitted to descend, the camoperating by reverse rotation of the shaft to raise the fulcrum end ofthe control lever and close the discharge valve whereby to check thedescent of the tup, further downward movement of the free end of thecontrol lever causing a repetition of the descent of the tup andchecking of the same.

18. In a lifting Windlass for dropstamping machines, the combinationwith a shaft provided with a pinion and carrying a drum to which isattached a flexible connection with the tup, of a motor for raising thetup and having its movable member provided with a rack engaging saidpinion, controllable means for regulating the operation of said motor,said controllable means being operable to free the motor and permitdropping of the tup, said connection being attached to the under side ofthe drum whereby the couple for starting the tup is rendered less thanthe normal couple which is attained when the flexible connection becomestangential to the drum.

Dated this 21st day of September 1920.

In testimony whereof I have signed this specification.

JEAN ALBERT PERONY.

